Searching for Prestons of Canada

Searching for Prestons of Canada

I'm searching for my ggggrandfather who's last name was Preston( first name,birth and death date unknown).He moved to Vermont where I believe he met his wife(unknown).They had a daughter born Sarah Ann Preston in 1840 in Charlotte, Chittenden Co;VT.For some reason,Sarah was adopted by the Zubar Family.Sarah Ann married my gggrandfather Abraham Ploff on May 17,1858 in VT.Sarah died on Oct 28,1887 in Ferrisburg,VT.Any additional help would be appreciated.Thank you!